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2024-11-08coverage: Restrict empty-span expansion to only cover `{` and `}`Zalathar-1/+1
2024-11-08coverage: Remove unhelpful code for handling multiple files per functionZalathar-5/+6
Functions currently can't have mappings in multiple files, and if that ever changes (e.g. to properly support expansion regions), this code will need to be completely overhauled anyway.
2024-06-12coverage: Replace the old span refiner with a single functionZalathar-1/+1
As more and more of the span refiner's functionality has been pulled out into separate early passes, it has finally reached the point where we can remove the rest of the old `SpansRefiner` code, and replace it with a single modestly-sized function.
2024-05-14coverage: Simplify counter expressions using simple algebraZalathar-4/+2
Some of these cases currently don't occur in practice, but are included for completeness, and to avoid having to add them later as branch coverage and MC/DC coverage start building more complex expressions.
2024-04-22coverage: Move mir-opt coverage tests into a subdirectoryZalathar-0/+55